支持delete，修改err输出为stderr

cmd/saastool/task_make.go

@@ -16,7 +16,7 @@ import (
 )
 
 const (
-	blockSizeMin = 10 * 1024 * 1024
+	blockSizeMin = 50 * 1024 * 1024
 	blockSizeMax = 200 * 1024 * 1024
 )
 
@@ -51,7 +51,7 @@ func RunTaskMake(args ...string) error {
 	desc := paramTaskDesc(fs)
 
 	if err := fs.Parse(args); err != nil {
-		fmt.Println("command line parse error", "err", err)
+		fmt.Fprintln(os.Stderr, "command line parse error", "err", err)
 		return err
 	}
 
@@ -62,14 +62,14 @@ func RunTaskMake(args ...string) error {
 
 	blockSizeNum, err := ParseByteSize(*blockSize)
 	if err != nil {
-		fmt.Println("Error parsing block size", "err", err)
-		fmt.Println("Using default 50M")
-		blockSizeNum = 50 * 1024 * 1024
+		fmt.Fprintln(os.Stderr, "Error parsing block size", "err", err)
+		fmt.Fprintln(os.Stderr, "Using default 200M")
+		blockSizeNum = 200 * 1024 * 1024
 
 	}
 
 	if blockSizeNum < blockSizeMin || blockSizeNum > blockSizeMax {
-		fmt.Println("block size error", "min", blockSizeMin, "max", blockSizeMax)
+		fmt.Fprintln(os.Stderr, "block size error", "min", blockSizeMin, "max", blockSizeMax)
 		return nil
 	}
 
@@ -157,7 +157,6 @@ func doTaskMake(makeTaskParams makeTaskParams) error {
 
 			if n > 0 {
 				wg.Add(1)
-				//fmt.Printf("\rhashing file [%v], block [%v]\n", makeTaskParams.sourcePath, index)
 				tasks <- &hashTask{
 					chunk:     buffer,
 					index:     index,
@@ -213,7 +212,6 @@ func hashWorker(tasks <-chan *hashTask, results chan<- *hashTask) {
 	for t := range tasks {
 		h.Write((*t.chunk)[:t.blockSize])
 		t.hash = hex.EncodeToString(h.Sum(nil))
-		//fmt.Printf("\rhashing block [%v]\n", t.index)
 		results <- t
 		h.Reset()
 	}